文献类型：期刊文献

中文题名：用于光电化学分解水的三维贯通纳米多孔Ta3N5薄膜: 厚度调控与稳定性研究

英文题名：3D interconnected nanoporous Ta3N5 films for photoelectrochemical water splitting: thickness-controlled synthesis and insights into stability

作者：Wang, Qiang[1,2,3];Zhang, Lingxia[3,4];Li, Bing[2];Zhu, Hongmin[1];Shi, Jianlin[3]

机构：[1]Tohoku Univ, Grad Sch Engn, Dept Met, Sendai, Miyagi 9808579, Japan;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[3]Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China;[4]Univ Chinese Acad Sci, Sch Chem & Mat Sci, Hangzhou Inst Adv Study, Hangzhou 310024, Peoples R China

年份：2021

卷号：64

期号：8

起止页码：1876

外文期刊名：SCIENCE CHINA-MATERIALS

收录：;EI(收录号：20210809938754);WOS:【SCI-EXPANDED(收录号:WOS:000617109700002)】；

基金：This work was financially supported by the National Natural Science Foundation of China (51774145, 51872317 and 21835007), and China Postdoctoral Science Foundation (2019M661644). The first author also thanks the China Scholarship Council (CSC) for financial support.

语种：中文

外文关键词：Ta3N5; 3D interconnected porous nanoarchitectures; thickness-controlled synthesis; photoelectrochemical water splitting; photostability

摘要：Solar-driven photoelectrochemical (PEC) water splitting is a promising technology for sustainable hydrogen production, which relies on the development of efficient and stable photoanodes for water oxidation reaction. The thickness and microstructure of semiconductor films are generally crucial to their PEC properties. Herein, three-dimensional (3D) interconnected nanoporous Ta3N5 film photoanodes with controlled thickness were successfully fabricated via galvanostatic anodization and NH3 nitridation. The porous Ta3N5 nanoarchitectures (NAs) of 900 nm in thickness showed the highest PEC performance due to the optimal light-harvesting and charge separation. Compared with the hole-induced photocorrosion, the electrochemical oxidation at high anodic potentials resulted in severer performance degradation of Ta3N5. Although the surface oxide layer on deteriorated Ta3N5 photoanodes could be removed by NH3 re-treatment, the PEC performance was only partially recovered. As an alternative, anchoring a dual-layer Co(OH)(x)/CoOOH co-catalyst shell on the porous Ta3N5 NAs demonstrated substantially enhanced PEC performance and stability. Overall, this work provides reference to controllably fabricate 3D nanoporous Ta3N5-based photoanodes for efficient and stable PEC water splitting via optimizing the light absorption, hole extraction, charge separation and utilization.